<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title></title>
  </head>
  <body>
    //**********  定义对象 node ******//

    function Node(data,left,right) {
    this.data = data;
    this.left = left;
    this.right = right;
    this.show = show;
}

function show() {
    return this.data;
}
  //******* 插入节点 *****//
function BST() {
    this.root = null;
    this.insert = insert;
    this.inOrder = inOrder;
}

function insert(data) {
    var n = new Node(data,null,null);
    if(this.root == null) {
        this.root = n;
    }else {
        var current = this.root;
        var parent;
        while(current) {
            parent = current;
            if(data <  current.data) {
                current = current.left;
                if(current == null) {
                    parent.left = n;
                    break;
                }
            }else {
                current = current.right;
                if(current == null) {
                    parent.right = n;
                    break;
                }
            }
        }
    }
}

function inOrder(node) {
    if(!(node == null)) {
        inOrder(node.left);
        console.log(node.show());
        inOrder(node.right);
    }
}
var nums = new BST();
nums.insert(23);
nums.insert(45);
nums.insert(16);
nums.insert(37);
nums.insert(3);
nums.insert(99);
nums.insert(22);
inOrder(nums.root);
</body>
</html>
